fast forward tming closure for Stratix

Hi,

I am using Hyper Optimization for Stratix design and on the fast forward optimization recommendations i don't get any info due to something called 'Retiming Dependency loop' .I am checking the document at https://www.altera.com/documentation/mtr1430270893021.html but i can't see any topic on this , just for generic loops. How could i solve this problem in order to get some recommendations?